220 BCrNCTD-E. 



2. Frontal not or scarcely larger than a praefrontal. 



36 scales round the body 97. parietale, p. 299. 



B. Frontoparietals two. 



37 scales round the body 98. jerdonianum, p. 300. 



56 or 57 scales round the body 99. breviceps, p. 300. 



VI. Limbs usually short or rudimentary. Lower eyelid scaly or 

 with an undivided transparent disk. Ear distinguishable. 

 Supranasals present (or, in one species, the nasal partially di- 

 vided longitudinally, and forming a suture with its fellow). 

 Praefrontals well developed. Frontal not broader than the 

 supraocular region. (Rio^a, Gray.) 



A. Limbs, both pairs pentadactyle. 



1. Frontoparietal single; limbs well developed; rostral not 



forming a suture with the frontonasal. 



65 to 67 scales round the body 100. microlejns, p. 301. 



33 or 34 scales round the body 101. garnieri, p. 301. 



2. Frontoparietals two. 



a. Eostral forming a suture with the frontonasal. 



[p. 302. 



34 or 36 scales round the body 102. allofasciolatuin, 



28 or 30 scales round the body 103. rufescens, p. 303. 



h. Rostral not forming a suture with the frontonasal. 



a. Lower eyelid scaly. 



* 30 or more scales round the middle of the body; 

 dorsals strongly tri- or quinquecarinate. 



30 scales round the body; four large 

 marginal praeanals ; ear nearly entirely 

 hidden under the scales 104. durum, p. 304. 



32 to 36 scales round the body ; no en- 

 larged praeanals ; ear exposed 105. fernandi, p. 304. 



** 26 or 28 scales round the body. 



t Supranasal imperfectly separated from the nasal. 



Dorsal scales sharply tricarinate 106. laviceps, p. 305. 



Dorsal scales smooth 107. onodestum, p. 306. 



tt Supranasal perfectly separated. 



Frontal longer than frontoparietals and 

 parietals together ; a pair of enlarged 

 nuchals 108. guineense, p. 306. 



